Art of de-inking plate-press wipers



Sept. 23,- 1924. 1,509,648

c. J. GUTBERLET ART OF DE-INKING PLATE PRESS WIPERS Filed June 2. 1923 INVENTOR Char/es IQuiber/ef flaw/041. 6001/,

ATTORNEY Patented Sept. 23, 1924.

kl STATES CHARLES J. GUTBERLE'IQOF PHILADELPHIA, PENNSYLVANIA.

ART or DE-INKING PLATE-PRESS wirnns.

Application filed June 2, 1923. Serial No. 642,991.

To all whom it may concern:

Be it known that 1., Cinemas J. Gorsnn- LET, a citizen of the United-States, and a resident of the city and county of Philadelphia, Pennsylvania, have invented a certain new and useful Improvement in the Art of De-l nking Plate-Press Vipers, of which the following is a specification.

My invention relates to the art of removing ink from the wiper of a plate printing press. lleretofore this removal of the ink has been accomplished by oiling the wiper upon the front face, that is, upon the face of the wiper on which the ink has accumulated. This action thinned the ink. It necessitated also a very hard pressure of a knife against the paper of the wiper because the ink lying directly upon the face of this paper was the least affected by the oil and the knife had to be pressed very hard against the paper in order to remove it. Usually some mechanical means of pressing the paper had. to be applied at the back side of the paper to force the face or front side of the paper down upon the knife. This pressru'e of the knife upon the paper produced an abrasion of the paper that were it out and contaminated the ink by scraped off particles of paper. My process on the contrary consists in applying oil freely to the back of the wiper. The back of the wiper is its face away from the plate wiped when it passes over it in the process of wiping; it does not come into contact with the plate and does not receive or collect ink from it but remains clean. The wiper is in practice a strip of paper which is quite porous. It is always made of porous material. The oil which is applied to the back of the paper strip quickly passes through the material of the paper and softens and usually more or less completely liquefies the portion of the ink clots lying against the paper on the face side of the paper. The paper is then carried, in practice, face downwards and the oil as it travels detaches the ink clots from the face side of the paper so that they either fall off or are knocked off readily by a cleaner, which needs no or only a trifling pressure to remove the ink clots from the face of the wiper. If it is desired to wash the paper even more thoroughly the paper can be sub jected to a second washing by applying a fresh supply of oil to the back of the wiper while it is travelling face downwards and then scraping oil the dilute mixture of oil and ink by a scraper upon wh'ch some small degree of pressure, usually by making the knife project into the papers course, is given. Usually, however, there is no necessity for this second or washing cleansing. If it is used the pressure upon the scraper will not be objectionable, because the highly dilute mixture of oil and ink is merely wasted and as its adhesion to the paper is very slight, the paper will not be injured as it would be in scraping off thick adhesive ink.

Describing now the best mechanical means of which I am at present aware for carrying out my invented art, Fig. 1 is a side elevation of these means, Fig. 2 is a plan View of the same. The devices for shifting the wiper are well known and their particular form is not pertinent to this in vention. The roller, 1, contacts with a roller, 17, which contacts with a roller, 18, which dips into the oil basin, 2. It is preferable that these rollers be positively driven and lie close to each other without touching. This will result in a large quantity of oil being carried from the basin, 2, to the roller, 1. This roller, 1, contacts with the back surface of the wiper and furnishes oil freely to it. This oil passes through the porous substance of the paper carrying with it any ink that may have penetrated into it and loosens: the ink clots from its face by liquefying or at any rate softening the portions of the ink clots lying directly against the surface of the paper. It is readily seen this does not contaminate the body of the ink clots. The wiper being car: ried horizontally or at an angle with the face downwards these ink clots will tend to fall off of their own weight or be easily pushed off by the cleaner, 5. The ink that is removed falls into the collector, 20. Preferably the cleaner, 5, has its edges where it contacts with the paper somewhat rounded to avoid any possibility of scrap ing it. The ink removed has all the characteristics of fresh ink. The paper should preferably be moving face downwards and horizontally when it passes over the collector, 20.

If the paper is to be oil washed in addition to the above treatment, an additional oil roller, 6, which is oiled by the roller, 7, which dips into the basin, 8, is brought into contact with the back of the wiper at a later part of the travel of the Wiper. This the ink.

again permeates the wiper with oil and will wash out practically all the remainder of The thin mixture of ink and oil will gather on the face side of the wiper which should travel face downward and is taken off by the scraping cleaner, 10. It is permissible to have this cleaner, 10, press fairly firmly on the paper. The ink removed is so thinned by oil as to be quite useless and has very little adhesion to the paper and consequently can be removed without tearing the paper or scraping off any portion of its surface and even if any portion. should be scraped off it makes no difference as it would go into the material that was wasted.

I claim- 1. The art of removing from the porous wiper of a plate printing press the accumulated ink, which consists in oilin the back face of the Wiper substantially without oiling the front face thereof until the wiper becomes permeated with oil and then removing the ink from the front face of the wiper mechanically.

2. The art of removing from the porous wiper of a plate printing press the accumulated ink, which consists in oiling the back of the wiper until the whole fabric thereof becomes permeated with oil and the ink clots loosened by the oil dissolving the parts thereof immediately adjacent to the face of the wiper, carrying the wiper face downwards over an ink receptacle and knocking off and collecting said clots in a receptacle.

3. The art as described in claim 1 with this additional step re-oiling the wiper on its back until it be a ain thoroughly permeated with oil, and t e oil and dilute ink is collected on its face and removing the oil and ink so collected by mechanical means.

CHARLES J. GUTBERLET. 

